Add pin mux for vf610 NAND Flash Controller (NFC). NAND can be connected using 8 or 16 data lines, this patch adds pin mux entries for all of the 16 possible data lines.

Signed-off-by: Stefan Agner stefan@agner.ch --- arch/arm/include/asm/arch-vf610/iomux-vf610.h | 34 +++++++++++++++++++++++++++ arch/arm/include/asm/imx-common/iomux-v3.h | 4 ++++ 2 files changed, 38 insertions(+)

diff --git a/arch/arm/include/asm/arch-vf610/iomux-vf610.h b/arch/arm/include/asm/arch-vf610/iomux-vf610.h index a965641..c324eda 100644 --- a/arch/arm/include/asm/arch-vf610/iomux-vf610.h +++ b/arch/arm/include/asm/arch-vf610/iomux-vf610.h @@ -19,6 +19,13 @@ #define VF610_DDR_PAD_CTRL PAD_CTL_DSE_25ohm #define VF610_I2C_PAD_CTRL (PAD_CTL_PUS_47K_UP | PAD_CTL_DSE_50ohm | \ PAD_CTL_SPEED_HIGH | PAD_CTL_OBE_IBE_ENABLE) +#define VF610_NFC_IO_PAD_CTRL (PAD_CTL_SPEED_MED | PAD_CTL_SRE | \ + PAD_CTL_DSE_50ohm | PAD_CTL_PUS_47K_UP | \ + PAD_CTL_OBE_IBE_ENABLE) +#define VF610_NFC_CN_PAD_CTRL (PAD_CTL_SPEED_MED | PAD_CTL_SRE | \ + PAD_CTL_DSE_25ohm | PAD_CTL_OBE_ENABLE) +#define VF610_NFC_RB_PAD_CTRL (PAD_CTL_SPEED_MED | PAD_CTL_SRE | \ + PAD_CTL_PUS_22K_UP | PAD_CTL_IBE_ENABLE)

#define VF610_QSPI_PAD_CTRL (PAD_CTL_SPEED_HIGH | PAD_CTL_DSE_150ohm | \ PAD_CTL_PUS_22K_UP | PAD_CTL_OBE_IBE_ENABLE) @@ -56,6 +63,15 @@ enum { VF610_PAD_PTA29__ESDHC1_DAT3 = IOMUX_PAD(0x004c, 0x004c, 5, __NA_, 0, VF610_SDHC_PAD_CTRL), VF610_PAD_PTB14__I2C0_SCL = IOMUX_PAD(0x0090, 0x0090, 2, 0x033c, 1, VF610_I2C_PAD_CTRL), VF610_PAD_PTB15__I2C0_SDA = IOMUX_PAD(0x0094, 0x0094, 2, 0x0340, 1, VF610_I2C_PAD_CTRL), + VF610_PAD_PTD31__NF_IO15 = IOMUX_PAD(0x00fc, 0x00fc, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD30__NF_IO14 = IOMUX_PAD(0x0100, 0x0100, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD29__NF_IO13 = IOMUX_PAD(0x0104, 0x0104, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD28__NF_IO12 = IOMUX_PAD(0x0108, 0x0108, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD27__NF_IO11 = IOMUX_PAD(0x010c, 0x010c, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD26__NF_IO10 = IOMUX_PAD(0x0110, 0x0110, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD25__NF_IO9 = IOMUX_PAD(0x0114, 0x0114, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD24__NF_IO8 = IOMUX_PAD(0x0118, 0x0118, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD23__NF_IO7 = IOMUX_PAD(0x011c, 0x011c, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), VF610_PAD_PTD0__QSPI0_A_QSCK = IOMUX_PAD(0x013c, 0x013c, 1, __NA_, 0, VF610_QSPI_PAD_CTRL), VF610_PAD_PTD1__QSPI0_A_CS0 = IOMUX_PAD(0x0140, 0x0140, 1, __NA_, 0, VF610_QSPI_PAD_CTRL), VF610_PAD_PTD2__QSPI0_A_DATA3 = IOMUX_PAD(0x0144, 0x0144, 1, __NA_, 0, VF610_QSPI_PAD_CTRL), @@ -68,6 +84,24 @@ enum { VF610_PAD_PTD10__QSPI0_B_DATA2 = IOMUX_PAD(0x0164, 0x0164, 1, __NA_, 0, VF610_QSPI_PAD_CTRL), VF610_PAD_PTD11__QSPI0_B_DATA1 = IOMUX_PAD(0x0168, 0x0168, 1, __NA_, 0, VF610_QSPI_PAD_CTRL), VF610_PAD_PTD12__QSPI0_B_DATA0 = IOMUX_PAD(0x016c, 0x016c, 1, __NA_, 0, VF610_QSPI_PAD_CTRL), + VF610_PAD_PTD22__NF_IO6 = IOMUX_PAD(0x0120, 0x0120, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD21__NF_IO5 = IOMUX_PAD(0x0124, 0x0124, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD20__NF_IO4 = IOMUX_PAD(0x0128, 0x0128, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD19__NF_IO3 = IOMUX_PAD(0x012c, 0x012c, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD18__NF_IO2 = IOMUX_PAD(0x0130, 0x0130, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD17__NF_IO1 = IOMUX_PAD(0x0134, 0x0134, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTD16__NF_IO0 = IOMUX_PAD(0x0138, 0x0138, 2, __NA_, 0, VF610_NFC_IO_PAD_CTRL), + VF610_PAD_PTB24__NF_WE_B = IOMUX_PAD(0x0178, 0x0178, 5, __NA_, 0, VF610_NFC_CN_PAD_CTRL), + VF610_PAD_PTB25__NF_CE0_B = IOMUX_PAD(0x017c, 0x017c, 5, __NA_, 0, VF610_NFC_CN_PAD_CTRL), + + VF610_PAD_PTB27__NF_RE_B = IOMUX_PAD(0x0184, 0x0184, 6, __NA_, 0, VF610_NFC_CN_PAD_CTRL), + + VF610_PAD_PTC26__NF_RB_B = IOMUX_PAD(0x018C, 0x018C, 5, __NA_, 0, VF610_NFC_RB_PAD_CTRL), + + VF610_PAD_PTC27__NF_ALE = IOMUX_PAD(0x0190, 0x0190, 6, __NA_, 0, VF610_NFC_CN_PAD_CTRL), + + VF610_PAD_PTC28__NF_CLE = IOMUX_PAD(0x0194, 0x0194, 6, __NA_, 0, VF610_NFC_CN_PAD_CTRL), + VF610_PAD_DDR_A15__DDR_A_15 = IOMUX_PAD(0x0220, 0x0220, 0, __NA_, 0, VF610_DDR_PAD_CTRL), VF610_PAD_DDR_A14__DDR_A_14 = IOMUX_PAD(0x0224, 0x0224, 0, __NA_, 0, VF610_DDR_PAD_CTRL), VF610_PAD_DDR_A13__DDR_A_13 = IOMUX_PAD(0x0228, 0x0228, 0, __NA_, 0, VF610_DDR_PAD_CTRL), diff --git a/arch/arm/include/asm/imx-common/iomux-v3.h b/arch/arm/include/asm/imx-common/iomux-v3.h index e91d4ac..70ee86c 100644 --- a/arch/arm/include/asm/imx-common/iomux-v3.h +++ b/arch/arm/include/asm/imx-common/iomux-v3.h @@ -123,6 +123,8 @@ typedef u64 iomux_v3_cfg_t; #define PAD_CTL_SPEED_MED (1 << 12) #define PAD_CTL_SPEED_HIGH (3 << 12)

+#define PAD_CTL_SRE (1 << 11) + #define PAD_CTL_DSE_150ohm (1 << 6) #define PAD_CTL_DSE_50ohm (3 << 6) #define PAD_CTL_DSE_25ohm (6 << 6) @@ -135,6 +137,8 @@ typedef u64 iomux_v3_cfg_t; #define PAD_CTL_PUE (1 << 2 | PAD_CTL_PKE)

#define PAD_CTL_OBE_IBE_ENABLE (3 << 0) +#define PAD_CTL_OBE_ENABLE (1 << 1) +#define PAD_CTL_IBE_ENABLE (1 << 0)

#else

This adds initial support for Freescale NFC (NAND Flash Controller) found in ARM Vybrid SoC's, Power Architecture MPC5125 and others. The driver is called vf610_nfc since this is the first supported and tested hardware platform supported by the driver.

Signed-off-by: Stefan Agner stefan@agner.ch --- drivers/mtd/nand/Makefile | 1 + drivers/mtd/nand/vf610_nfc.c | 714 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 715 insertions(+) create mode 100644 drivers/mtd/nand/vf610_nfc.c

diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index bf1312a..eef86d1 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -51,6 +51,7 @@ obj-$(CONFIG_NAND_KB9202) += kb9202_nand.o obj-$(CONFIG_NAND_KIRKWOOD) += kirkwood_nand.o obj-$(CONFIG_NAND_KMETER1) += kmeter1_nand.o obj-$(CONFIG_NAND_MPC5121_NFC) += mpc5121_nfc.o +obj-$(CONFIG_NAND_VF610_NFC) += vf610_nfc.o obj-$(CONFIG_NAND_MXC) += mxc_nand.o obj-$(CONFIG_NAND_MXS) += mxs_nand.o obj-$(CONFIG_NAND_NDFC) += ndfc.o diff --git a/drivers/mtd/nand/vf610_nfc.c b/drivers/mtd/nand/vf610_nfc.c new file mode 100644 index 0000000..32203fd --- /dev/null +++ b/drivers/mtd/nand/vf610_nfc.c @@ -0,0 +1,714 @@ +/* + * Copyright 2009-2014 Freescale Semiconductor, Inc. and others + * + * Description: MPC5125, VF610, MCF54418 and Kinetis K70 Nand driver. + * Ported to U-Boot by Stefan Agner + * Based on RFC driver posted on Kernel Mailing list by Bill Pringlemeir + * Jason ported to M54418TWR and MVFA5. + * Authors: Stefan Agner stefan.agner@toradex.com + * Bill Pringlemeir bpringlemeir@nbsps.com + * Shaohui Xie b21989@freescale.com + * Jason Jin Jason.jin@freescale.com + * + * Based on original driver mpc5121_nfc.c. + * + * This is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * Limitations: + * - Untested on MPC5125 and M54418. + * - DMA not used. + * - 2K pages or less. + * - Only 2K page w. 64+OOB and hardware ECC. + */ + +#include <common.h> +#include <malloc.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/nand.h> +#include <linux/mtd/partitions.h> + +#include <nand.h> +#include <errno.h> +#include <asm/io.h> +#include <asm/processor.h> + +/* Register Offsets */ +#define NFC_FLASH_CMD1 0x3F00 +#define NFC_FLASH_CMD2 0x3F04 +#define NFC_COL_ADDR 0x3F08 +#define NFC_ROW_ADDR 0x3F0c +#define NFC_ROW_ADDR_INC 0x3F14 +#define NFC_FLASH_STATUS1 0x3F18 +#define NFC_FLASH_STATUS2 0x3F1c +#define NFC_CACHE_SWAP 0x3F28 +#define NFC_SECTOR_SIZE 0x3F2c +#define NFC_FLASH_CONFIG 0x3F30 +#define NFC_IRQ_STATUS 0x3F38 + +/* Addresses for NFC MAIN RAM BUFFER areas */ +#define NFC_MAIN_AREA(n) ((n) * 0x1000) + +#define PAGE_2K 0x0800 +#define OOB_64 0x0040 + +/* + * NFC_CMD2[CODE] values. See section: + * - 31.4.7 Flash Command Code Description, Vybrid manual + * - 23.8.6 Flash Command Sequencer, MPC5125 manual + * + * Briefly these are bitmasks of controller cycles. + */ +#define READ_PAGE_CMD_CODE 0x7EE0 +#define PROGRAM_PAGE_CMD_CODE 0x7FC0 +#define ERASE_CMD_CODE 0x4EC0 +#define READ_ID_CMD_CODE 0x4804 +#define RESET_CMD_CODE 0x4040 +#define STATUS_READ_CMD_CODE 0x4068 + +/* NFC ECC mode define */ +#define ECC_BYPASS 0 +#define ECC_45_BYTE 6 + +/*** Register Mask and bit definitions */ + +/* NFC_FLASH_CMD1 Field */ +#define CMD_BYTE2_MASK 0xFF000000 +#define CMD_BYTE2_SHIFT 24 + +/* NFC_FLASH_CM2 Field */ +#define CMD_BYTE1_MASK 0xFF000000 +#define CMD_BYTE1_SHIFT 24 +#define CMD_CODE_MASK 0x00FFFF00 +#define CMD_CODE_SHIFT 8 +#define BUFNO_MASK 0x00000006 +#define BUFNO_SHIFT 1 +#define START_BIT (1<<0) + +/* NFC_COL_ADDR Field */ +#define COL_ADDR_MASK 0x0000FFFF +#define COL_ADDR_SHIFT 0 + +/* NFC_ROW_ADDR Field */ +#define ROW_ADDR_MASK 0x00FFFFFF +#define ROW_ADDR_SHIFT 0 +#define ROW_ADDR_CHIP_SEL_RB_MASK 0xF0000000 +#define ROW_ADDR_CHIP_SEL_RB_SHIFT 28 +#define ROW_ADDR_CHIP_SEL_MASK 0x0F000000 +#define ROW_ADDR_CHIP_SEL_SHIFT 24 + +/* NFC_FLASH_STATUS2 Field */ +#define STATUS_BYTE1_MASK 0x000000FF + +/* NFC_FLASH_CONFIG Field */ +#define CONFIG_ECC_SRAM_ADDR_MASK 0x7FC00000 +#define CONFIG_ECC_SRAM_ADDR_SHIFT 22 +#define CONFIG_ECC_SRAM_REQ_BIT (1<<21) +#define CONFIG_DMA_REQ_BIT (1<<20) +#define CONFIG_ECC_MODE_MASK 0x000E0000 +#define CONFIG_ECC_MODE_SHIFT 17 +#define CONFIG_FAST_FLASH_BIT (1<<16) +#define CONFIG_16BIT (1<<7) +#define CONFIG_BOOT_MODE_BIT (1<<6) +#define CONFIG_ADDR_AUTO_INCR_BIT (1<<5) +#define CONFIG_BUFNO_AUTO_INCR_BIT (1<<4) +#define CONFIG_PAGE_CNT_MASK 0xF +#define CONFIG_PAGE_CNT_SHIFT 0 + +/* NFC_IRQ_STATUS Field */ +#define IDLE_IRQ_BIT (1<<29) +#define IDLE_EN_BIT (1<<20) +#define CMD_DONE_CLEAR_BIT (1<<18) +#define IDLE_CLEAR_BIT (1<<17) + +#define NFC_TIMEOUT (1000) + +/* ECC status placed at end of buffers. */ +#define ECC_SRAM_ADDR ((PAGE_2K+256-8) >> 3) +#define ECC_STATUS_MASK 0x80 +#define ECC_ERR_COUNT 0x3F + +/* + * ECC status is stored at NFC_CFG[ECCADD] +4 for little-endian + * and +7 for big-endian SOC. + */ +#ifdef CONFIG_VF610 +#define ECC_OFFSET 4 +#else +#define ECC_OFFSET 7 +#endif + +struct vf610_nfc { + struct mtd_info *mtd; + struct nand_chip chip; +/* struct device *dev;*/ + void __iomem *regs; + uint column; + int spareonly; + int page; + /* Status and ID are in alternate locations. */ + int alt_buf; +#define ALT_BUF_ID 1 +#define ALT_BUF_STAT 2 + struct clk *clk; +}; + +#define mtd_to_nfc(_mtd) (struct vf610_nfc *)((struct nand_chip *)_mtd->priv)->priv; + +static u8 bbt_pattern[] = {'B', 'b', 't', '0' }; +static u8 mirror_pattern[] = {'1', 't', 'b', 'B' }; + +static struct nand_bbt_descr bbt_main_descr = { + .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | + NAND_BBT_2BIT | NAND_BBT_VERSION, + .offs = 11, + .len = 4, + .veroffs = 15, + .maxblocks = 4, + .pattern = bbt_pattern, +}; + +static struct nand_bbt_descr bbt_mirror_descr = { + .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | + NAND_BBT_2BIT | NAND_BBT_VERSION, + .offs = 11, + .len = 4, + .veroffs = 15, + .maxblocks = 4, + .pattern = mirror_pattern, +}; + +static struct nand_ecclayout vf610_nfc_ecc45 = { + .eccbytes = 45, + .eccpos = {19, 20, 21, 22, 23, + 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, + 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, + 56, 57, 58, 59, 60, 61, 62, 63}, + .oobfree = { + {.offset = 8, + .length = 11} } +}; + +static inline u32 vf610_nfc_read(struct mtd_info *mtd, uint reg) +{ + struct vf610_nfc *nfc = mtd_to_nfc(mtd); + + return readl(nfc->regs + reg); +} + +static inline void vf610_nfc_write(struct mtd_info *mtd, uint reg, u32 val) +{ + struct vf610_nfc *nfc = mtd_to_nfc(mtd); + + writel(val, nfc->regs + reg); +} + +static inline void vf610_nfc_set(struct mtd_info *mtd, uint reg, u32 bits) +{ + vf610_nfc_write(mtd, reg, vf610_nfc_read(mtd, reg) | bits); +} + +static inline void vf610_nfc_clear(struct mtd_info *mtd, uint reg, u32 bits) +{ + vf610_nfc_write(mtd, reg, vf610_nfc_read(mtd, reg) & ~bits); +} + +static inline void vf610_nfc_set_field(struct mtd_info *mtd, u32 reg, + u32 mask, u32 shift, u32 val) +{ + vf610_nfc_write(mtd, reg, + (vf610_nfc_read(mtd, reg) & (~mask)) | val << shift); +} + +/* Clear flags for upcoming command */ +static inline void vf610_nfc_clear_status(void __iomem *regbase) +{ + void __iomem *reg = regbase + NFC_IRQ_STATUS; + u32 tmp = __raw_readl(reg); + tmp |= CMD_DONE_CLEAR_BIT | IDLE_CLEAR_BIT; + __raw_writel(tmp, reg); +} + +/* Wait for complete operation */ +static inline void vf610_nfc_done(struct mtd_info *mtd) +{ + struct vf610_nfc *nfc = mtd_to_nfc(mtd); + uint start; + + /* + * Barrier is needed after this write. This write need + * to be done before reading the next register the first + * time. + * vf610_nfc_set implicates such a barrier by using writel + * to write to the register. + */ + vf610_nfc_set(mtd, NFC_FLASH_CMD2, START_BIT); + + start = get_timer(0); + + while (!(vf610_nfc_read(mtd, NFC_IRQ_STATUS) & IDLE_IRQ_BIT)) { + if (get_timer(start) > NFC_TIMEOUT) { + printf("Timeout while waiting for !BUSY.\n"); + return; + } + } + vf610_nfc_clear_status(nfc->regs); +} + +static u8 vf610_nfc_get_id(struct mtd_info *mtd, int col) +{ + u32 flash_id; + + if (col < 4) { + flash_id = vf610_nfc_read(mtd, NFC_FLASH_STATUS1); + return (flash_id >> (3-col)*8) & 0xff; + } else { + flash_id = vf610_nfc_read(mtd, NFC_FLASH_STATUS2); + return flash_id >> 24; + } +} + +static u8 vf610_nfc_get_status(struct mtd_info *mtd) +{ + return vf610_nfc_read(mtd, NFC_FLASH_STATUS2) & STATUS_BYTE1_MASK; +} + +/* Single command */ +static void vf610_nfc_send_command(void __iomem *regbase, u32 cmd_byte1, + u32 cmd_code) +{ + void __iomem *reg = regbase + NFC_FLASH_CMD2; + u32 tmp; + vf610_nfc_clear_status(regbase); + + tmp = __raw_readl(reg); + tmp &= ~(CMD_BYTE1_MASK | CMD_CODE_MASK | BUFNO_MASK); + tmp |= cmd_byte1 << CMD_BYTE1_SHIFT; + tmp |= cmd_code << CMD_CODE_SHIFT; + __raw_writel(tmp, reg); +} + +/* Two commands */ +static void vf610_nfc_send_commands(void __iomem *regbase, u32 cmd_byte1, + u32 cmd_byte2, u32 cmd_code) +{ + void __iomem *reg = regbase + NFC_FLASH_CMD1; + u32 tmp; + vf610_nfc_send_command(regbase, cmd_byte1, cmd_code); + + tmp = __raw_readl(reg); + tmp &= ~CMD_BYTE2_MASK; + tmp |= cmd_byte2 << CMD_BYTE2_SHIFT; + __raw_writel(tmp, reg); +} + +static void vf610_nfc_addr_cycle(struct mtd_info *mtd, int column, int page) +{ + if (column != -1) { + struct vf610_nfc *nfc = mtd_to_nfc(mtd); + if (nfc->chip.options | NAND_BUSWIDTH_16) + column = column/2; + vf610_nfc_set_field(mtd, NFC_COL_ADDR, COL_ADDR_MASK, + COL_ADDR_SHIFT, column); + } + if (page != -1) + vf610_nfc_set_field(mtd, NFC_ROW_ADDR, ROW_ADDR_MASK, + ROW_ADDR_SHIFT, page); +} + +/* Send command to NAND chip */ +static void vf610_nfc_command(struct mtd_info *mtd, unsigned command, + int column, int page) +{ + struct vf610_nfc *nfc = mtd_to_nfc(mtd); + + nfc->column = max(column, 0); + nfc->spareonly = 0; + nfc->alt_buf = 0; + + switch (command) { + case NAND_CMD_PAGEPROG: + nfc->page = -1; + vf610_nfc_send_commands(nfc->regs, NAND_CMD_SEQIN, + command, PROGRAM_PAGE_CMD_CODE); + vf610_nfc_addr_cycle(mtd, column, page); + break; + + case NAND_CMD_RESET: + vf610_nfc_send_command(nfc->regs, command, RESET_CMD_CODE); + break; + /* + * NFC does not support sub-page reads and writes, + * so emulate them using full page transfers. + */ + case NAND_CMD_READOOB: + nfc->spareonly = 1; + case NAND_CMD_SEQIN: /* Pre-read for partial writes. */ + case NAND_CMD_READ0: + column = 0; + /* Already read? */ + if (nfc->page == page) + return; + nfc->page = page; + vf610_nfc_send_commands(nfc->regs, NAND_CMD_READ0, + NAND_CMD_READSTART, READ_PAGE_CMD_CODE); + vf610_nfc_addr_cycle(mtd, column, page); + break; + + case NAND_CMD_ERASE1: + if (nfc->page == page) + nfc->page = -1; + vf610_nfc_send_commands(nfc->regs, command, + NAND_CMD_ERASE2, ERASE_CMD_CODE); + vf610_nfc_addr_cycle(mtd, column, page); + break; + + case NAND_CMD_READID: + nfc->alt_buf = ALT_BUF_ID; + vf610_nfc_send_command(nfc->regs, command, READ_ID_CMD_CODE); + break; + + case NAND_CMD_STATUS: + nfc->alt_buf = ALT_BUF_STAT; + vf610_nfc_send_command(nfc->regs, command, STATUS_READ_CMD_CODE); + break; + default: + return; + } + + vf610_nfc_done(mtd); +} + +static inline void vf610_nfc_read_spare(struct mtd_info *mtd, void *buf, + int len) +{ + struct vf610_nfc *nfc = mtd_to_nfc(mtd); + + len = min(mtd->oobsize, (uint)len); + if (len > 0) + memcpy(buf, nfc->regs + mtd->writesize, len); +} + +/* Read data from NFC buffers */ +static void vf610_nfc_read_buf(struct mtd_info *mtd, u_char *buf, int len) +{ + struct vf610_nfc *nfc = mtd_to_nfc(mtd); + uint c = nfc->column; + uint l; + + /* Handle main area */ + if (!nfc->spareonly) { + l = min((uint)len, mtd->writesize - c); + nfc->column += l; + + if (!nfc->alt_buf) + memcpy(buf, nfc->regs + NFC_MAIN_AREA(0) + c, l); + else + if (nfc->alt_buf & ALT_BUF_ID) + *buf = vf610_nfc_get_id(mtd, c); + else + *buf = vf610_nfc_get_status(mtd); + + buf += l; + len -= l; + } + + /* Handle spare area access */ + if (len) { + nfc->column += len; + vf610_nfc_read_spare(mtd, buf, len); + } +} + +/* Write data to NFC buffers */ +static void vf610_nfc_write_buf(struct mtd_info *mtd, const u_char *buf, + int len) +{ + struct vf610_nfc *nfc = mtd_to_nfc(mtd); + uint c = nfc->column; + uint l; + + l = min((uint)len, mtd->writesize + mtd->oobsize - c); + nfc->column += l; + memcpy(nfc->regs + NFC_MAIN_AREA(0) + c, buf, l); +} + +/* Read byte from NFC buffers */ +static u8 vf610_nfc_read_byte(struct mtd_info *mtd) +{ + u8 tmp; + vf610_nfc_read_buf(mtd, &tmp, sizeof(tmp)); + return tmp; +} + +/* Read word from NFC buffers */ +static u16 vf610_nfc_read_word(struct mtd_info *mtd) +{ + u16 tmp; + vf610_nfc_read_buf(mtd, (u_char *)&tmp, sizeof(tmp)); + return tmp; +} + +/* If not provided, upper layers apply a fixed delay. */ +static int vf610_nfc_dev_ready(struct mtd_info *mtd) +{ + /* NFC handles R/B internally; always ready. */ + return 1; +} + +/* + * This function supports Vybrid only (MPC5125 would have full RB and four CS) + */ +static void vf610_nfc_select_chip(struct mtd_info *mtd, int chip) +{ +#ifdef CONFIG_VF610 + u32 tmp = vf610_nfc_read(mtd, NFC_ROW_ADDR); + tmp &= ~(ROW_ADDR_CHIP_SEL_RB_MASK | ROW_ADDR_CHIP_SEL_MASK); + tmp |= 1 << ROW_ADDR_CHIP_SEL_RB_SHIFT; + + if (chip == 0) + tmp |= 1 << ROW_ADDR_CHIP_SEL_SHIFT; + else if (chip == 1) + tmp |= 2 << ROW_ADDR_CHIP_SEL_SHIFT; + + vf610_nfc_write(mtd, NFC_ROW_ADDR, tmp); +#endif +} + +/* Count the number of 0's in buff upto max_bits */ +static inline int count_written_bits(uint8_t *buff, int size, int max_bits) +{ + uint32_t *buff32 = (uint32_t *)buff; + int k, written_bits = 0; + + for (k = 0; k < (size / 4); k++) { + written_bits += hweight32(~buff32[k]); + if (written_bits > max_bits) + break; + } + + return written_bits; +} + +static inline int vf610_nfc_correct_data(struct mtd_info *mtd, u_char *dat) +{ + struct vf610_nfc *nfc = mtd_to_nfc(mtd); + u8 ecc_status; + u8 ecc_count; + int flip; + + ecc_status = __raw_readb(nfc->regs + ECC_SRAM_ADDR * 8 + ECC_OFFSET); + ecc_count = ecc_status & ECC_ERR_COUNT; + if (!(ecc_status & ECC_STATUS_MASK)) + return ecc_count; + + /* If 'ecc_count' zero or less then buffer is all 0xff or erased. */ + flip = count_written_bits(dat, nfc->chip.ecc.size, ecc_count); + + /* ECC failed. */ + if (flip > ecc_count) { + nfc->page = -1; + return -1; + } + + /* Erased page. */ + memset(dat, 0xff, nfc->chip.ecc.size); + return 0; +} + + +static int vf610_nfc_read_page(struct mtd_info *mtd, struct nand_chip *chip, + uint8_t *buf, int oob_required, int page) +{ + int eccsize = chip->ecc.size; + int stat; + uint8_t *p = buf; + + + vf610_nfc_read_buf(mtd, p, eccsize); + + if (oob_required) + vf610_nfc_read_buf(mtd, chip->oob_poi, mtd->oobsize); + + stat = vf610_nfc_correct_data(mtd, p); + + if (stat < 0) + mtd->ecc_stats.failed++; + else + mtd->ecc_stats.corrected += stat; + + return 0; +} + +/* + * ECC will be calculated automatically + */ +static int vf610_nfc_write_page(struct mtd_info *mtd, struct nand_chip *chip, + const uint8_t *buf, int oob_required) +{ + vf610_nfc_write_buf(mtd, buf, mtd->writesize); + if (oob_required) + vf610_nfc_write_buf(mtd, chip->oob_poi, mtd->oobsize); + + return 0; +} + +struct vf610_nfc_config { + int hardware_ecc; + int width; + int flash_bbt; +}; + +static int vf610_nfc_nand_init(int devnum, void __iomem *addr) +{ + struct mtd_info *mtd = &nand_info[devnum]; + struct nand_chip *chip; + struct vf610_nfc *nfc; + int err = 0; + int page_sz; + struct vf610_nfc_config cfg = { + .hardware_ecc = 1, +#ifdef CONFIG_SYS_NAND_BUSWIDTH_16BIT + .width = 16, +#else + .width = 8, +#endif + .flash_bbt = 1, + }; + + nfc = malloc(sizeof(*nfc)); + if (!nfc) { + printf(KERN_ERR "%s: Memory exhausted!\n", __func__); + return -ENOMEM; + } + + chip = &nfc->chip; + nfc->regs = addr; + + mtd->priv = chip; + chip->priv = nfc; + + if (cfg.width == 16) { + chip->options |= NAND_BUSWIDTH_16; + vf610_nfc_set(mtd, NFC_FLASH_CONFIG, CONFIG_16BIT); + } else { + chip->options &= ~NAND_BUSWIDTH_16; + vf610_nfc_clear(mtd, NFC_FLASH_CONFIG, CONFIG_16BIT); + } + + chip->dev_ready = vf610_nfc_dev_ready; + chip->cmdfunc = vf610_nfc_command; + chip->read_byte = vf610_nfc_read_byte; + chip->read_word = vf610_nfc_read_word; + chip->read_buf = vf610_nfc_read_buf; + chip->write_buf = vf610_nfc_write_buf; + chip->select_chip = vf610_nfc_select_chip; + + /* Bad block options. */ + if (cfg.flash_bbt) + chip->bbt_options = NAND_BBT_USE_FLASH | NAND_BBT_CREATE; + + /* Default to software ECC until flash ID. */ + vf610_nfc_set_field(mtd, NFC_FLASH_CONFIG, + CONFIG_ECC_MODE_MASK, + CONFIG_ECC_MODE_SHIFT, ECC_BYPASS); + + chip->bbt_td = &bbt_main_descr; + chip->bbt_md = &bbt_mirror_descr; + + page_sz = PAGE_2K + OOB_64; + page_sz += cfg.width == 16 ? 1 : 0; + vf610_nfc_write(mtd, NFC_SECTOR_SIZE, page_sz); + + /* Set configuration register. */ + vf610_nfc_clear(mtd, NFC_FLASH_CONFIG, CONFIG_ADDR_AUTO_INCR_BIT); + vf610_nfc_clear(mtd, NFC_FLASH_CONFIG, CONFIG_BUFNO_AUTO_INCR_BIT); + vf610_nfc_clear(mtd, NFC_FLASH_CONFIG, CONFIG_BOOT_MODE_BIT); + vf610_nfc_clear(mtd, NFC_FLASH_CONFIG, CONFIG_DMA_REQ_BIT); + vf610_nfc_set(mtd, NFC_FLASH_CONFIG, CONFIG_FAST_FLASH_BIT); + + /* Enable Idle IRQ */ + vf610_nfc_set(mtd, NFC_IRQ_STATUS, IDLE_EN_BIT); + + /* PAGE_CNT = 1 */ + vf610_nfc_set_field(mtd, NFC_FLASH_CONFIG, CONFIG_PAGE_CNT_MASK, + CONFIG_PAGE_CNT_SHIFT, 1); + + /* Set ECC_STATUS offset */ + vf610_nfc_set_field(mtd, NFC_FLASH_CONFIG, + CONFIG_ECC_SRAM_ADDR_MASK, + CONFIG_ECC_SRAM_ADDR_SHIFT, ECC_SRAM_ADDR); + + /* first scan to find the device and get the page size */ + if (nand_scan_ident(mtd, CONFIG_SYS_MAX_NAND_DEVICE, NULL)) { + err = -ENXIO; + goto error; + } + + chip->ecc.mode = NAND_ECC_SOFT; /* default */ + + page_sz = mtd->writesize + mtd->oobsize; + + /* Single buffer only, max 256 OOB minus ECC status */ + if (page_sz > PAGE_2K + 256 - 8) { + dev_err(nfc->dev, "Unsupported flash size\n"); + err = -ENXIO; + goto error; + } + page_sz += cfg.width == 16 ? 1 : 0; + vf610_nfc_write(mtd, NFC_SECTOR_SIZE, page_sz); + + if (cfg.hardware_ecc) { + if (mtd->writesize != PAGE_2K && mtd->oobsize < 64) { + dev_err(nfc->dev, "Unsupported flash with hwecc\n"); + err = -ENXIO; + goto error; + } + + chip->ecc.layout = &vf610_nfc_ecc45; + + /* propagate ecc.layout to mtd_info */ + mtd->ecclayout = chip->ecc.layout; + chip->ecc.read_page = vf610_nfc_read_page; + chip->ecc.write_page = vf610_nfc_write_page; + chip->ecc.mode = NAND_ECC_HW; + + chip->ecc.bytes = 45; + chip->ecc.size = PAGE_2K; + chip->ecc.strength = 24; + + /* set ECC mode to 45 bytes OOB with 24 bits correction */ + vf610_nfc_set_field(mtd, NFC_FLASH_CONFIG, + CONFIG_ECC_MODE_MASK, + CONFIG_ECC_MODE_SHIFT, ECC_45_BYTE); + + /* Enable ECC_STATUS */ + vf610_nfc_set(mtd, NFC_FLASH_CONFIG, CONFIG_ECC_SRAM_REQ_BIT); + } + + /* second phase scan */ + err = nand_scan_tail(mtd); + if (err) + return err; + + err = nand_register(devnum); + if (err) + return err; + + return 0; + +error: + return err; +} + +void board_nand_init(void) +{ + int err = vf610_nfc_nand_init(0, (void __iomem *)CONFIG_SYS_NAND_BASE); + if (err) + printf("VF610 NAND init failed (err %d)\n", err); +}